error: it is more idiomatic to use `Option<&T>` instead of `&Option<T>`
  --> tests/ui/ref_option/ref_option_traits.rs:15:5
   |
LL |     fn trait_opt(&self, a: &Option<String>);
   |     ^^^^^^^^^^^^^^^^^^^^^^^---------------^^
   |                            |
   |                            help: change this to: `Option<&String>`
   |
   = note: `-D clippy::ref-option` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::ref_option)]`

error: it is more idiomatic to use `Option<&T>` instead of `&Option<T>`
  --> tests/ui/ref_option/ref_option_traits.rs:16:5
   |
LL |     fn trait_ret(&self) -> &Option<String>;
   |     ^^^^^^^^^^^^^^^^^^^^^^^---------------^
   |                            |
   |                            help: change this to: `Option<&String>`

error: aborting due to 2 previous errors